Samuel m



(No Model.)

S. M. PUIEPER.

ATTACHMENT TO DYNAMO ELBGTROPLATING MACHINE.

No. 265.340. Patented 001:. 3, 1882.

' em\ or XML; kmml? UNITED STATES PATENT OFFICE.

SAMUEL M. PUFFER, 0F DETROIT, MICHIGAN.

ATTACHMENT TO DYNAMO-ELECTROPLATING MACHINES.

SPECIFICATION forming part of Letters Patent No. 265,340, dated October3, 1882.

Application filed February 11, 1882.

To all whom it may concern Be it known that I, SAMUEL M. PUFFER, ofDetroit, in the county of \Nayne and State of Michigan, have inventednew and useful Improvements in Attachments to Dynamo-ElectroplatingMachines; andIhereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawing, which forms a part of this specification.

The nature of this invention relates to certain new and usefulimprovements in the construction otdevices for the prevention ofshortcircuitiiig of the electric current in dynamoelectroplatingmachines.

Theinvention consistsin the peculiar adaptation ot'an electro-magnet andspring armatureplate, and the connection of the same with the posts of adynamo-machine, all as more fully hereinafter set forth.

In the accompanying drawing, which forms a part of this specification, Arepresents a dynamo-machine of any of the known constructions. Thepositive pole of the machineis connected to the post B by means of thewire 0 1, as shown, while the negative pole is connected, by means ofthe wire 9 10, to the post (J. A wire, 7 8, connects the vat D to thepole U, while a wire, 5 6, connects the opposite end of the vat, withthe post E. From this post there runs a wire, 3 4, to the post F.

H represents a conducting spring-plate, se cured at one end to the topof the post B and in contact with the wire 0 1. The free end of thisspring-plate is provided with an armature, d, which is attracted by theelectro-niagnet I, the coil of such magnet being connected,by means ofsmall wires I II, and III IV, to the posts B and C, respectively, and asis clearly shown in the drawings.

(No model.)

In practice, as the machine is started, a sufiieient current passesthrough the wires I II III IV and the magnet to render the latter activeand attract thereto the armature of the spring-plate, causing the latterto come in contact with the post F, which establishes the main currentfrom the machine to the vat through the posts and wires hereinbeforedescribed, the spring-plate being held in this position at all timeswhile the machine is run- U ning. When the machine is stopped, therebeing a cessation of the electrical current, the electro magnet becomesinactive, and the spring-plate instantly flies up, breaking theconnection between itself and the post F, and thus avoiding all dangerof there being a re turncurrent to the machine, as would he thrown offby the highly-charged vat.

I am aware of Patents Nos. 31,545, 252,665, and 253,435, and I do notclaim the devices described in either patent.

What I claim is The combination, with the dynamo-electric machine A andthe posts B U, connected to the positive and negative poles of saidmachine, of a separate electro-magnet, I, conuected,by wires I II andIII IV, to the postsB U, the depositing-cell D, connected at one end, bythe wires 7 8, to the post (J, and at its opposite end, bytsuitableconnections with the post F, the spring-plate H, secured to the post Band provided with an armature, a, over the electromagnet I, and adaptedto make and break the circuit between the posts B F, substantially asshown and described, and for the purpose specified.

SAMUEL M. PUFFER.

IVitnesses:

H. S. SPRAGUE, 1 E. SoULLY.

